Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 77, NWS Jackson, MS
NWS Jackson, MS issued this flash flood warning at Aug 17, 2021, 3:27 PM CDT for Concordia Parish, Louisiana; Adams County, Mississippi. It was in force for 74 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2021, 3:27 PM CDT (20:27 UTC)
- Expired
- Aug 17, 2021, 4:41 PM CDT
- In force
- 74 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Flood severity
- None
Counties Concordia Parish, LA, Adams County, MS
The radar
The Ft Polk radar (KPOE), 140 km from the middle of the area, began a volume at 20:26 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 8.5 hours before the alert went out and 166 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 286 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 1039 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
638
WGUS54 KJAN 172027
FFWJAN
LAC029-MSC001-172230-
/O.NEW.KJAN.FF.W.0077.210817T2027Z-210817T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jackson MS
327 PM CDT Tue Aug 17 2021
The National Weather Service in Jackson has issued a
* Flash Flood Warning for...
Northeastern Concordia Parish in northeastern Louisiana...
Central Adams County in southwestern Mississippi...
* Until 530 PM CDT.
* At 327 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. Flash flooding is expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Natchez, Vidalia, Ferriday, Monterey, Deer Park, Cranfield and
Ridgecrest.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3146 9172 3156 9168 3162 9153 3165 9143
3165 9142 3163 9128 3154 9120 3148 9126
3140 9150 3140 9175 3143 9173 3144 9173
3144 9172 3145 9172
FLASH FLOOD...RADAR INDICATED
$$
EC1 follow-up statement
713
WGUS74 KJAN 172141
FFSJAN
Flash Flood Statement
National Weather Service Jackson MS
441 PM CDT Tue Aug 17 2021
LAC029-MSC001-172151-
/O.CAN.KJAN.FF.W.0077.000000T0000Z-210817T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Concordia LA-Adams MS-
441 PM CDT Tue Aug 17 2021
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL ADAMS COUNTY AND
NORTHEASTERN CONCORDIA PARISH...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3146 9172 3156 9168 3162 9153 3165 9143
3165 9142 3163 9128 3154 9120 3148 9126
3140 9150 3140 9175 3143 9173 3144 9173
3144 9172 3145 9172
$$
ECNearby
Flash Flood Warnings in Louisiana, 2021Flash Flood Warnings in Mississippi, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.